Automatic damper-regulator.



e. PURUHOLMEN. AUTOMATIC DAMPER REGULATOR.

APPLICATION FILED AUG. 13, 190B Patented June 1, 1909..

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' APPLICATION. FILED AUG. 13. 1908. 923,259

Patented June 1, 1909. J: a SHEETS-SHBET 2.

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APPLICATION FILED AUG. 13, 1908., V Patented June 1, 1909.

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srA'rns PATENT orricn.

GEORGEFURUHOLMEN, OFEAST BUTTE, MONTANA.

all whom it may concern:

. Be it knownthat LGEoiien FURUHOLMEN,

scription of the invention,

a citizen of the United States, residing at East Butte, in the county: of Silverbo-w and State of Montana, have invented certain new and useful Improvements in Automatic ,Damper-Regulatorsg and I do declarethe be a full, clear, and exact desuch as will enable others skilled in the art to which it appertains tomalre and use the same.

This invention relatesto an improved automatic damper regulator especially adapted for use in connection with steam boiler furnaces andihas for its 'object to provide improved regulating means whereby the proper supply of], air chamber may be had at all times. I

A further bject, of the invention is to provide damperregulating means which is of as simple'structureas is possible consistfollowing to ent with ,eflicient oper'atioin', and which is adapted fora'pplication to any of the ordinary forms of steam boiler] furnaces with a minimum of labor and time consumption.

With these and other objects in view, the invention coniists of ceitainnovel features of construction, combination and arrangement of parts, as will be more fully described and particularly pointed out in the appended claims. I

In the accompanying drawings, Figure 1 k is a horizontal sectiontaken through a furdamper regulator 21s a vertical transthe line 2-2 of Fig.

nace with my improved applied thereto; verse section taken on v 1 looking inthedirection indicated by the arrows'yFi'gr 3 is a similar view taken on line 3-3 of'Fig. 1 look ng'in the direction indicated by the arrows; Fig. 4 is a side elevation ofa portion "of thefurnace with the damper regulator in position; Fig. 5 is a front elevation of Fig. lg'Fig. 6 is a horizontal section of onecori'ierrof the furnace showing a swinging arm for operating to raise the damper; Fig.7 is a similar view, with the swinging arm inits other position; Fig. 8 is a transverse section taken on the line 88 ofFig. 7 looking in the direction indicated by the arrows; and Fig. 9 is a vertical section on an enlarged scale through the lower end of he fluidfcontaining cylinder and the piston. In Figsyl, 2, and damperregulator is shown as applied to but one side of the furnace only, as the regu- 3' of the drawings the I Specification of Letters Patent. l Application filed August 13, 1903.

furnace with the opening to the combustion duced tapered the furnace door and Automatic DAMPER-REGULATOR.

Patented June 1, 1909.

Serial No. 448,351.

upper side of its furlator arranged at the construction and opnace is of identical eration.

In the embodiment illustrated, the side wall 1 of the furnace is provided in rear of the grate 2, with a transverse air inlet passage 3. The damper regulator comprises an upright support shaving an approximately rectangular base 5, provided with a transverse opening -6, and a tapering body portion 7, which rises from and is of less thickness than the base. This support is mounted upon the outside of the side wall 1 of the 3 in its base, in registration with the air passage 3. A tubular sleeve 8 is fitted in the opening 6 of the base of the support and extends into the air passage 3. A damper having an approximately semi-circular portion 9, and a reopposite end portion 10 is pivoted at its reduced end portion to the base of the support a, as at 11, in position to adapt its semi-circular portion 9 to close the opening in the tube 8.

I will now describe an arrangement by which the damper may be opened by closing by which it may be permitted to gradually close in the desired length of time. A connecting element 12, is attached at one end to the semicircular J portion of the damper and at its opposite end to the outer end of a laterally projecting cross head 13, mounted to slide in a guideway 1 1 arranged at the upper end of the tapered body portion 7 of the support a. A flexible connecting element 15 is attached at one end to the cross head, then extends over a pulley 16 mounted at the upper extremity of the body portion of the support, next extends along the side wall 3 of the furnace to the front wall 17 thereof, and is attached by means of a clamp 17 and a U- shaped connection 17 pivoted to the clamp, to a horizontal arm 18 mounted to swing upon the upper end of the hinge bolt 19 of the furnace door 20.

An upright fluid containing cylinder 21 is mounted upon the body 7 of the support 1 directly beneath the cross head 13, and arranged to slide vertically within said cylinder is a piston 22 provided with a downwardly opening flap valve 22 and having the usual stem 23, which extends through the upper end of the cylinder and connects with the cross head 13. A fluid conducting pipe 2e communicates with opposite ends of the cylinder and is provided with a valve 25 to control the passage of the fluid from one end of the cylinder to the other. The outer end of the arm 18 is provided with a pivoted catch 26 having a hook portion 27 with an outer beveled surface 28, the catch being normally supported in elevated position by an extension 29 extending laterally from the clamp 17. When the pivoted damper is closed and the piston 22 at the lower end of the cylinder, the arm 18 is in the position indicated in Figs. 6 and 4. To raise the pivoted damper the furnace door is swung open to the position indicated in Fig. 6 to engage the hook portion of the catch. The furnace door is then swung into closed position, carrying with it the arm 18, until said arm has reached the position indicated in Fig. 7, when the beveled surface 28 of the hook portion of the pivoted catch rides upon the oppositely beveled surface 30 of a lug 31 extending forwardly from the front plate of the furnace 32 in the path of the pivoted catch, and is thereby disengaged from the upper edge of the furnace door, which effects the release of the swinging arm 18. During the operation of swinging the door in the position indicated by Fig. 7 the semi-circular portion 6 of the pivoted damper is raised and the piston 22 raised to the upper end of the fluid containing cylinder. As the piston 22 is raised in the cylinder the flap valve 22 opens and allows the oil to pass through the piston. When the swinging arm is released the piston 22 is permitted to gradually descend in the cylinder and in doing so will force the oil through the fluid conducting pipe 24, above the piston, it being evident that the time consumed by the piston in descending from the upper to the lower end of the cylinder may be regulated by the valve 25, and for this reason the time required to entirely close the opening 6 and an air inlet passage 3 may be regulated at will.

A second damper 33 is suitably mounted to slide in front of the opening 6, in the base of the support between the latter and the first mentioned damper and provides a means whereby the size of the inlet opening may be increased or lessened as desired when the pivoted damper is raised.

The furnace which is so constructed as to insure thorough commingling of the air with the gases is provided with a center-piece 34 and with arc-shaped walls 35 which are ar-- ranged between the center-piece and side walls of the furnace a suitable distance above the grate 2 and extend somewhat in rear of the grate, as clearly shown in Fig. 5

l l I of the drawings. A wall or partition 36 is also arranged in rear of the walls 35 and is provided with a plurality .of outlet passages 38, the purpose of which will be understood. It is to be understood that while my improved damper regulating means is used in connection with a furnace of the type I here show and describe, it is evident that it may be used in connection with any form of steam boiler furnace to which it is applicable.

From the foregoing description taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention, as defined in the appended claims.

Having thus described my invention, what I claim as new is 1. In combination with a furnace having a pivoted damper, a horizontal swinging arm pivoted to the furnace door, a catch pivoted to the outer end of said arm, means for normally supporting the catch in horizontal position, connections between the swinging arm and the pivoted damper for raising the latter when the furnace door is closed after having been first engaged with the pivoted catch, and a lug projecting from the front plate of the furnace to disengage the catch with the door when the latter is swung into closed position.

2. In combination with a furnace having a pivoted damper, a horizontal swinging arm pivoted to the furnace, a catch having a hook portion provided with a beveled surface pivoted to said arm, means carried by the arm to normally hold the catch in horizontal or door engaging position, connections between the arm and damper, a lug provided with a cam or beveled surface to engage the beveled surface of the hook portion of the catch and lift the catch out of engagement with the-furnace door when the latter is swung into closed position, and means for controlling the return of the damper into lowered or closed position, when the catch is disengaged with the furnace door.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

GEO. FURUI-IOLMEN. 

